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Signal judgment apparatus and signal judgment method

一种判定装置、信号的技术，应用在直流电平复原装置/偏置畸变校正、多路复用通信、基带系统零部件等方向

Active Publication Date: 2009-09-23
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the determination of the category of the received signal may not be completed within a short time after receiving the HTSIG

Method used

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  • Signal judgment apparatus and signal judgment method
  • Signal judgment apparatus and signal judgment method
  • Signal judgment apparatus and signal judgment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] Hereinafter, a wireless communication device having the function of the signal determination device according to the embodiment of the present invention will be described with reference to the drawings.

[0058] In this embodiment, two frame formats required by the 11n standard will be described as objects. One frame format is a frame format of legacy mode (legacy mode corresponding to the existing 11a terminal). The other is a frame format of mixed mode (a mode in which 11a terminals and 11n terminals are mixed).

[0059] "Frame Format"

[0060] refer to figure 1 The frame format of the 11n standard used in wireless communication by the wireless communication device according to this embodiment will be described. figure 1 It is a diagram showing an example of the frame format of the 11n standard.

[0061]

[0062] figure 1 The frame format shown in (a) is the frame format (11a format) of the genetic mode.

[0063] In the 11a format 10, there are a storage field...

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PUM

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Abstract

An FFT unit (170) performs Fourier transformation of a reception symbol to separate it into a plurality of subcarriers, and a phase difference detection unit (193) detects a phase difference between each of four pilot carriers and a data carrier adjacent to the each pilot carrier (adjacent carrier). A judgment unit (194) judges whether or not the phase difference between the pilot carriers and the adjacent carrier detected by the phase difference detection unit (193) meets a phase difference condition. The judgment unit (194) judges that the reception symbol is an HTSIG when the number of phase differences which meet the phase difference condition is equal to or larger than a predetermined number and judges that the reception symbol is either SIG or DATA when the number of phase differences which meet the phase difference condition is less than the predetermined number.

Description

technical field [0001] The present invention relates to a technology for receiving frequency division multiplexed signals in a wireless system such as a wireless LAN (Local Area Network: Local Area Network) system. Background technique [0002] In recent years, the popularization of wireless LAN based on IEEE (Institute of Electrical and Electronics Engineers: Institute of Electrical and Electronics Engineers) 802.11 standard has been advanced, and it has been applied in offices and homes. [0003] Cable connection of wireless communication devices is not required in wireless LAN, so wireless LAN is suitable for wireless communication of battery-driven portable wireless communication devices. It is expected that such battery-driven wireless communication devices can be continuously used for a long period of time, and low power consumption has become an important issue. [0004] On the other hand, the transmission speed of wireless LAN is required to be higher, so a proposal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04J11/00H04J99/00
CPCH04L27/2647H04L25/0228H04L25/06
Inventor 白方亨宗细川修也宫长健二今村幸司
Owner INTERDIGITAL PATENT HLDG INC